Finding the Fourth Proportional to 158,637.57, 218,920.17 and 87,018.18

Step by Step Solution

1. Step 1: Write the proportion equation
   158,637.57 : 218,920.17 = 87,018.18 : x
2. Step 2: Convert to fraction form
   158,637.57/218,920.17 = 87,018.18/x
3. Step 3: Cross multiply
   158,637.57x = 218,920.17 × 87,018.18
4. Step 4: Simplify right side
   158,637.57x = 19,050,034,758.69
5. Step 5: Solve for x
   x = 19,050,034,758.69/158,637.57
6. Step 6: Final answer
   x = 120,085.27